Laser blood therapy stands for light amplification by stimulated emission of radiation blood therapy. Laser light has a specific wavelength that focuses a narrow beam of light and causes a high-intensity light to treat cancer.
One article (1) looked at laser blood therapy and its treatment of cancer. It indicated that this type of therapy is being used to kill cancer cells as well as precancerous growths. Lasers are used mainly to treat superficial cancers rather than deep cancers.
The article also noted that it is being used to treat non-small cell lung cancer, vulvar cancer, vaginal cancer, penile cancer, and basal cell cancer. Laser blood therapy can also be used to treat the symptoms of cancer, such as bleeding or obstruction of the esophagus or trachea. It is often combined with radiation therapy, chemotherapy, and surgery for the treatment of the above cancers.
Source: 1.Lasers in Cancer Treatment. http://www.cancer.gov/about-cancer/treatment/types/surgery/lasers-fact-sheet. Accessed 9/9/16.